Abstract
C/Si3N4 nanocomposites have been prepared through carbon black nanograins, graphite micrograins addition to silicon nitride starting powder. The role of excess oxygen was examined by oxidising the alpha silicon nitride starting powder. For nanocomposite processing sinter-HIP and hot press have been applied. Bending strength and elastic modulus have been found to be influenced by amount of carbon black and graphite introduced in silicon nitride matrix. In the case of HIP samples a desintering process was observed. During pressure-less sintering step the structure retained the α-Si3N4 phase, after second sintering step new phase(s) appeared. Hot pressed samples with a higher α-Si3N4 phase contribution showed considerable improvement of hardness.
| Original language | English |
|---|---|
| Pages (from-to) | 3287-3294 |
| Number of pages | 8 |
| Journal | Journal of the European Ceramic Society |
| Volume | 24 |
| Issue number | 12 |
| DOIs | |
| Publication status | Published - 2004 |
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Keywords
- Nanocomposites
- Porosity
- SiN
- Sintering
- Strength
ASJC Scopus subject areas
- Ceramics and Composites
Cite this
Manufacture and examination of C/Si3N4 nanocomposites. / Balázsi, C.; Cinar, F. S.; Addemir, O.; Wéber, F.; Arató, P.
In: Journal of the European Ceramic Society, Vol. 24, No. 12, 2004, p. 3287-3294.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Manufacture and examination of C/Si3N4 nanocomposites
AU - Balázsi, C.
AU - Cinar, F. S.
AU - Addemir, O.
AU - Wéber, F.
AU - Arató, P.
PY - 2004
Y1 - 2004
N2 - C/Si3N4 nanocomposites have been prepared through carbon black nanograins, graphite micrograins addition to silicon nitride starting powder. The role of excess oxygen was examined by oxidising the alpha silicon nitride starting powder. For nanocomposite processing sinter-HIP and hot press have been applied. Bending strength and elastic modulus have been found to be influenced by amount of carbon black and graphite introduced in silicon nitride matrix. In the case of HIP samples a desintering process was observed. During pressure-less sintering step the structure retained the α-Si3N4 phase, after second sintering step new phase(s) appeared. Hot pressed samples with a higher α-Si3N4 phase contribution showed considerable improvement of hardness.
AB - C/Si3N4 nanocomposites have been prepared through carbon black nanograins, graphite micrograins addition to silicon nitride starting powder. The role of excess oxygen was examined by oxidising the alpha silicon nitride starting powder. For nanocomposite processing sinter-HIP and hot press have been applied. Bending strength and elastic modulus have been found to be influenced by amount of carbon black and graphite introduced in silicon nitride matrix. In the case of HIP samples a desintering process was observed. During pressure-less sintering step the structure retained the α-Si3N4 phase, after second sintering step new phase(s) appeared. Hot pressed samples with a higher α-Si3N4 phase contribution showed considerable improvement of hardness.
KW - Nanocomposites
KW - Porosity
KW - SiN
KW - Sintering
KW - Strength
UR - http://www.scopus.com/inward/record.url?scp=2142822927&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=2142822927&partnerID=8YFLogxK
U2 - 10.1016/j.jeurceramsoc.2003.10.021
DO - 10.1016/j.jeurceramsoc.2003.10.021
M3 - Article
AN - SCOPUS:2142822927
VL - 24
SP - 3287
EP - 3294
JO - Journal of the European Ceramic Society
JF - Journal of the European Ceramic Society
SN - 0955-2219
IS - 12
ER -